{"title":"Janus star-shaped siloxane polymers with oriented alkoxy functional groups. Synthesis and properties","authors":"I.N. Krizhanovskiy , I.V. Frank , P.D. Shkinev , D.A. Khanin , Y.N. Malakhova , M.N. Temnikov , A.A. Anisimov","doi":"10.1016/j.jorganchem.2024.123374","DOIUrl":null,"url":null,"abstract":"<div><p>Siloxane star-shaped polymers have been obtained by sequential hydrothiolation and hydrosilylation of vinyl- and hydride-containing tetracyclosilsesquioxane. The mild conditions of these reactions avoid ring isomerization, opening the way to star-shaped polymers based on a stereoregular silsesquioxane ring. Monofunctional telechelic PDMS and a mixture of polymer star-shaped stereoisomers were synthesized as reference materials. All resulting compounds bore the same functional groups and were analyzed by GPC, TGA, DSC and NMR. The study of monolayers of these compounds on the Langmuir trough allowed to evaluate the influence of stereoregularity and pre-organization of the star PDMS on the parameters of the formed monolayers.</p></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1022 ","pages":"Article 123374"},"PeriodicalIF":2.1000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Organometallic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022328X24003693","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Siloxane star-shaped polymers have been obtained by sequential hydrothiolation and hydrosilylation of vinyl- and hydride-containing tetracyclosilsesquioxane. The mild conditions of these reactions avoid ring isomerization, opening the way to star-shaped polymers based on a stereoregular silsesquioxane ring. Monofunctional telechelic PDMS and a mixture of polymer star-shaped stereoisomers were synthesized as reference materials. All resulting compounds bore the same functional groups and were analyzed by GPC, TGA, DSC and NMR. The study of monolayers of these compounds on the Langmuir trough allowed to evaluate the influence of stereoregularity and pre-organization of the star PDMS on the parameters of the formed monolayers.
期刊介绍：
The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds.
Organometallic compounds are defined as compounds that contain metal - carbon bonds. The term metal includes all alkali and alkaline earth metals, all transition metals and the lanthanides and actinides in the Periodic Table. Metalloids including the elements in Group 13 and the heavier members of the Groups 14 - 16 are also included. The term chemistry includes syntheses, characterizations and reaction chemistry of all such compounds. Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome.
The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences, and of heavier main group elements in organometallic chemistry. The journal also publishes review articles, short communications and notes.
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